The status attribute is the basic material model of the product, which determines the function of the product.
By issuing commands, human operations can change these status attributes；
If it is a sensor class or a product with sampling function, the environment will also change the device status attribute.

When the device property status value changes because of the following two reasons:
1. Self-state changes (such as the value of a sensor changes);
2. Human operation (pressed the device button)

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After the event is triggered, the platform will carry the current status parameter of the device, and report the message in real time,
The specific mechanism is described in "Section 5: Message push"

All configuration items are saved in the Flash of the device, because Flash has a write limit,
So the platform does not open the interface to modify the configuration of the device in batch, you can modify the configuration item in the console.

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All configuration items have default values, such as do not understand the meaning of the configuration item, do not modify it randomly;
Modifying the configuration item can only be successfully sent and saved when the device is online, and does not require a restart of the device.

The principle of firmware update is compatibility upgrade, that is, the new firmware version will retain the original functions and commands.
If the current firmware can meet the business requirements, you can not upgrade the latest version of the firmware.